STUNNING - No Reinfection in Previously Infected (Harvard Preprint Study) This study from Harvard Medical School done in healthcare workers shows the CODVID incidence rate in vaccinated, unvaccinated, and previously infected individuals. Let's review the study. Buy me a coffee :-) Become my patron: Looking to support my educational work? Donate here: References Study preprint: Study preprint PDF: What are person-days? Or what is person-time? Interesting links: #datatracker-home https://covid
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